Shivaprakash N. Ramakrishna

TL;DR: The enhancement of steric stabilization coupled to the intrinsic absence of chain ends by cyclic brushes, produce surfaces displaying a super-lubricating character when they are sheared against each other, enabling the modulation of physico-chemical properties that could be just marginally tuned by applying linear grafts.

TL;DR: It is demonstrated that rough particles exhibit DST over a broader range of shear rates and for volume fractions much lower than for smooth colloids, due to interlocking of surface asperities, showing that taking an engineering-tribology approach is a powerful way to tune DST.

TL;DR: The era of poly(ethylene glycol) (PEG) brushes as a universal panacea for preventing non-specific protein adsorption and providing lubrication to surfaces is coming to an end, and the combination of structural parameters necessary to design polymer-brush-based biointerfaces are redefined, identifying a novel, superior polymer formulation.

TL;DR: It is observed that adhesion force reaches a minimum value at an optimum particle density on the gradient sample, where the mean particle spacing becomes comparable with the diameter of the contact area with the polyethylene sphere.

TL;DR: While the thermally induced dehydration of linear PEOXA shells cause irreversible aggregation of the NPs, the collapse and subsequent rehydration of similarly grafted cyclic brushes allow the full recovery of individually dispersed NPs.